flap door

noun

1. Also called falling door. a door hinged at the bottom so as to fall downward and outward.
2. a door placed horizontally or on a shallow incline, as an exterior cellar door.

Word History and Origins

Origin of flap door¹

First recorded in 1835–45

Example Sentences

At the front is a flap door which is kept closed while the torpedo is slipped into its place.

From Project Gutenberg

In the side of his wagon cover next to me was a flap-door, which, the day being fine, was fastened open.

From Project Gutenberg

In front of each tier of 12 compartments is a flap door opening downward.

From Project Gutenberg

The other part of the shop is closed by a flap-door that does not show on the picture.

From Project Gutenberg